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新疆天文台学术报告2017年第19次:The BOSS Emission-Line Lens Survey: Strong Lensing of Lyα Emitters by Individual Galaxies
2017-10-10 15:25:00| 【 【打印】【关闭】

报告题目:The BOSS Emission-Line Lens Survey: Strong Lensing of Lyα Emitters by Individual Galaxies

报 告 人:舒轶平 副研究员(紫金山天文台)

  要:We present Hubble Space Telescope (HST) F606W-band imaging observations of 21 galaxy-Lyα emitter lens candidates in the Baryon Oscillation Spectroscopic Survey (BOSS) Emission-Line Lens Survey (BELLS) for GALaxy-Lyα EmitteR sYstems (BELLS GALLERY) survey. 17 systems are confirmed to be definite lenses with unambiguous evidence of multiple imaging. The lenses are primarily massive early-type galaxies (ETGs) at redshifts of approximately 0.55, while the lensed sources are Lyα emitters (LAEs) at redshifts from 2 to 3. The HST imaging data are well fit by smooth lens models consisting of singular isothermal ellipsoids in an external shear field. The Einstein radii of the BELLS GALLERY lenses are on average 60% larger than those of the BELLS lenses because of the much higher source redshifts which will allow a detailed investigation of the radius evolution of the mass profile in ETGs. With the aid of the average 13× lensing magnification, the LAEs are resolved to comprise individual star-forming knots of a wide range of properties with characteristic sizes from less than 100 pc to several kpc, rest-frame far UV apparent AB magnitudes from 29.6 to 24.2, and typical projected separations of 500 pc to 2 kpc.

报告人简介:舒轶平,中国科学院紫金山天文台副研究员。2014年毕业于美国犹他大学(博士),2015年到2017年,先后在犹他大学和中国科学院国家天文台做博士后。20177月到中国科学院紫金山天文台工作。

报告时间:20171011日(周三)上午12:40

报告地点:台本部天文技术实验楼107会议室

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